Internal Environment of Multicellular Organism
- The internal environment of a multicellular cell is referring to the medium surrounding the cell.
- It consists of blood plasma and interstitial fluid. (also called the extracellular fluid)
Homeostasis
Homeostasis is the property of a system, especially a living organism, that regulates its internal environment so as to maintain a stable, constant condition.
Factors Affecting the Internal Environment.
- Body temperature
- pH value of the blood
- Sugar level of the blood
- Blood pressure
- Osmotic pressure of the blood
- Concentration of the oxygen and carbon dioxide in the blood
Importance of Homeostasis
Maintaining a suitable environment for all the enzyme function efficienly, and hence enable all biochemical reactions been carried out at their maximum rate.
Regulation of body temperature
| Nervous system | Detect changes in body temperature |
| Integumentary system | Produces sweat when the surrounding is hot. |
| Circulatory system | Transports and distributes heat evenly through out the body |
| Muscular system | Shivering to produce heat when the surrounding is cool. |